[Plugin: W3 Total Cache] Page Expiry

Im not sure how to describe this but when I cache my homepage, I may make a post and then see the home page update (both logged in and not, and in different browsers), but sometimes my friend may still see a cached version, so they don’t see the newest post until a short or long time later.

What can I do to correct this? Im also on CDN btw.

I also noticed that the RSS on FeedBurner doesn’t seem to update itself if you delete posts from your blog, but the site’s RSS feed itself (www.site.com/feed) does (even when cached)…so i dont know what is causing the problem on the feedburner end.